Portal 2 Walkthrough → Chapter 9: The Part Where He Kills You
Wheatley lures us into a trap and tries to kill us. We look around for an escape route. We create a portal on the bent surface where the white gel drips, and another on the wall to the left and above. The gel shoots toward our position. We quickly create new portals on the floor and on the wall. We complete simple tasks, dodging Wheatley's attacks. Having reached a room with damaged glass, a console, and a pipe with white liquid, we try to activate the console.
Bombs are ejected through the pipe. We create a portal on the floor where they fall, and another one on the wall above the console. Activate the console and detonate the pipe with the white liquid. We create a portal on the floor and escape this room. Next, run along the walkway; when it starts moving, jump onto the metal structure. We create a portal under the pipe with the bombs and under the pipe with the orange gel.
We activate the console. Then we create portals on the surface, at the end of the path, and under the dripping gel. The path fills, and we can safely run along it. We leave the portal under the dripping gel and move forward. We create another portal on the left wall at the end of the corridor. We douse it and create a new portal, the one that was under the gel, under the gravity beam. We accelerate along the gel and penetrate the beam.
Finally, we reach Wheatley's lair. We hide behind the pipe with white gel. When it is destroyed, the gel will splatter almost the entire area. Dealing with Wheatley is quite simple. The fight will be divided into three stages. We create a portal on the floor and stand directly in front of it. Now grenades will land safely in the portal. We create a second portal on any of the upper panels.
When Wheatley starts throwing grenades, you need to run away; they don't change trajectory anyway. He'll be stunned, and we'll get the first module and attach it to Wheatley. Simply jump through the blue gel. The second stage is the same, only this time we create the second portal not on the panel above, but on the floor, directly beneath Wheatley. We attach the next module. The third stage is a bit more challenging.
Create a second portal again on the top panel, but this time directly behind it (so the grenades hit Wheatley's back). Take out the last module: create a portal directly under the module and another one on the surface at the end of the path with the orange gel. If you can't reach it, keep trying until you succeed. As a last resort, change the portal's position under the module. All that's left is to attach it and activate the last console. This won't work—the explosion will knock you back. Aim the cannon at the moon and fire.
Source: degames.ru
Screenshots: Starocta